The Spitzer space telescope, the fourth and final element in NASA’s Great Observatories program, is a 0.85 meter diameter cryogenically cooled infrared telescope that was launched in 2003 August. The observatory is the manifestation of a concept originated at Ames Research Center in the 1980s. Thomas Roellig of the Astrophysics Branch, is a member of the Spitzer Science Working Group (SWG), serving as Facility Scientist and as the deputy Principal Investigator of the Infrared Spectrometer instrument. Dale Cruikshank, also in the Astrophysics Branch, provided his expertise on solar system objects as an inter-disciplinary science member of the SWG. Other NASA Ames scientists have been using the telescope for research, studying failed stars known as brown dwarfs, star formation in elliptical galaxies, supernovae remnants, and molecules in the interstellar medium.